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/*************************************************
* Random Number Generator Base Source File *
* (C) 1999-2008 Jack Lloyd *
*************************************************/
#include <botan/rng.h>
#include <botan/secmem.h>
#include <botan/util.h>
namespace Botan {
/*************************************************
* Default fast poll for EntropySources *
*************************************************/
u32bit EntropySource::fast_poll(byte buf[], u32bit len)
{
return this->slow_poll(buf, len);
}
/*************************************************
* Get a single random byte *
*************************************************/
byte RandomNumberGenerator::next_byte()
{
byte out;
this->randomize(&out, 1);
return out;
}
/*************************************************
* Add entropy to internal state *
*************************************************/
void RandomNumberGenerator::add_entropy(const byte random[], u32bit length)
{
this->add_randomness(random, length);
}
/*************************************************
* Add entropy to internal state *
*************************************************/
u32bit RandomNumberGenerator::add_entropy(EntropySource& source,
bool slow_poll)
{
SecureVector<byte> buffer(1024);
u32bit bytes_gathered = 0;
if(slow_poll)
bytes_gathered = source.slow_poll(buffer, buffer.size());
else
bytes_gathered = source.fast_poll(buffer, buffer.size());
this->add_entropy(buffer, bytes_gathered);
return entropy_estimate(buffer, bytes_gathered);
}
}
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